You've supplied even more evidence you've never been in a violent situation and have no idea how to handle yourself or what the cops are allowed to do. You've also showed you've never had to execute a dynamic plan involving people of any sort. It's easy to sit back and make an academic exercise of it after the fact. Real life is different and more dangerous. Let him drive away with a knife and kids in a vehicle after he's shown he's violent? I posted a link that showed that not even Canadian cops allow that.
Probably not your fault you think like a coward. You probably grew up in a good neighborhood and never had to deal with bad guys.
Rittenhouse had no reason to be where he was. He was an agitator, and should be charged with murder. Going down to a protest armed with a rifle shows premeditation.
Since I was trained in martial arts by an RCMP officer and subsequently I have trained other officers over a couple decades, I likely have a bit more refined perspective that my previous observations can rest on. Any resort to physical force means a failed attempt at de-escalation (or no attempt). That is why police bodycams should be mandatory.
Cops don't get enough training, so of course they want to go straight to the gun. It takes longer than the few months to nail down effective restraint techniques, effectively use pressure points, execute winning ground-fighting moves. If you can't get the job done inside 15 seconds, you've lost.
I would make their training a minimum of 2 years, and not allow them to wear guns for their first 5 years, and force them to radio in for authorization to use lethal force when they do have to go get their gun.
Cops generally speaking do have a mentality of "us" versus "them", and they join because it is generally exciting and they get to pound ass and brag about it at cop parties. Cops don't sit around and do retrospectives and analyze what went wrong and how to do their job with less violence, instead they go the other direction and figure out how to justify up front a perp so they get to use their gun. This guy had priors, so they had a negative profile on which to hope they could inflame the situation to deteriorate to a point where they would get to use their gun and later be confident it would be justified and they would get a pat on the back.
Every encounter you have with a cop, even if it is a ticket, they have an informal off-the-record notes field attached to your name so if you mouth off to a cop, the NEXT time you are stopped, the cop sees that profile and treats you like garbage and hopes you react even worse. A lot of cops deliberately try to figure out how to escalate encounters so they can build up a basis to pound you into the ground.
It's unfortuate that the lesson these police forces need to learn will take a long time because they don't like being told what to do.
Another point of perspective includes personal interaction with police missings persons reports spanning the time the Pickton murders occurred, and watching police testify and lie in court. Also, one only has to listen to a few dozen providers talk about their interactions with police to get yet another view. For anyone to say police should be given the benefit of the doubt, they need to see first hand how culturally corrupt they are as an entity.
They are many fine individual police officers inside, but they are rendered impotent by their environment and history. Consider an airline that crashes one flight out 1,000; they get shut down until the fix is in place and public confidence is restore. One does not say "Oh, but look at all the non-crashes! One little accident, why, that is a rare outlier!"
It is not a matter of being "for" or "against" cops, its a matter of seeing an issue, identifying the problem then fixing it, then repeat.